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✨ Chaowat Intarapanit
<html> <head> <title>Let's Start </title> <style> .block{ background-color: red; width: 100px; height: 100px; margin: 5px; } .blue{ background-color: blue; } </style> </head> <body> <div class="block"></div> <div class="block"></div> <div class="block blue"></div> <div class="block blue"></div> <div class="block blue"></div> </body> </html>